The last week has been a bad week for me and my flock, having lost all but one duck and a separate coop of bantams, from some unknown predator. The coop was pretty old, but kept predators out for years. I need to get back on my feet with a new flock. I'm going to tear down my current coop and put up a new open air coop. I'm still working on the overall design, but it's going to be around 10 feet long, 5 or 6 wide and 5 and a half tall. I've been looking at predator deterrents and I want to know what works? Electric fencing? Motion activated lights and sprinklers? How big should the hardware cloth apron be? What else should I do for the new coop?